<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .c1{
            height: 200px;
            width: 200px;
            border: 1px solid black;
            box-shadow: 10px 10px 20px rgba(1,1,1,0.5);
        }
    </style>
</head>
<body>



<iframe height="600" width="100%" src="https://www.baidu.com" frameborder="0"></iframe>


</body>

</html>